Opera users can now send CryptoKitties and other cryptocurrency-based collectibles to their friends using the web browser’s built-in Ethereum wallet.

The Norwegian software company, whose controlling shareholder is bitcoin mining giant Bitmain, announced on Friday that it has added support for a “curated list” of Ethereum-based tokens built to the ERC-721 standard.

From the announcement:

“We are big fans of collectibles. They are unique digital things you can own on the blockchain and collect in your wallet. We believe that as an increasing portion of our lives moves online, so will our collections of things…. We believe this is only the beginning of this trend and that, as technology and usability improves, more online games and other services will adopt such tokens. We also see the possibility for these unique tokens to unlock access to content or verify eligibility for certain digital services.”

The wallet already supported both ether and ERC-20 tokens, and users will now be able to hold Ethereum-based collectibles from decentralized applications (dApps) such as CryptoKitties, which allows players to buy, sell, and breed unique digital cats.

While MetaMask and other extension-based Ethereum wallets already offer similar functionality, Opera notes that it is the first mainstream web browser to feature a native cryptocurrency wallet that makes this feature available.

To create a wallet, users will need to download the Android version of the Opera browser, which is still in private beta but is nevertheless widely accessible through an opt-in program. Private keys remain stored on the mobile device, but users can link their wallets to the firm’s PC browser. This allows the user to initiate payments and interact with dApps on PC, though they will need to sign all transactions on their mobile device.

Opera first launched its cryptocurrency wallet in July, shortly after the China-based Bitmain paid $50 million to obtain a controlling stake in the software company.